This page explains how Stefano Ratti (USATT# 25847)'s rating went from n/a to 1970 at the MDTTC February Open held on - 3 Feb 2002. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.